Filter cloth holder



April 27, 1937.

B. F. P ARR ET AL FILTER CLOTH HOLDER Filed Feb. 8, 1935 Resilient Material "tun/annoullpaaaalraanaanllnl Rama/z: Materzal V SMQ. m m mr m W70 T m A Pa FPY d rJ m rw ea, BL NAN WITNESSES:

ributes A t.- 27, 1937 ATENT OFFICE mm cnorn nomm Bernard F. Panand Lewis J. Greenawalt, Harlifield, hio, assignors to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation of Pennsyl Application Fame, 1935, Serial 'No. 5.55s

, 80laims. (01. 210-162) our invention relates to coilee making maw chines and particularly to filter assembhes for such devices.

An object of our invention is to provide a novel and simple filter assemblydfor a coffee making machine that shall comprise a minimum number of parts.

Another object-of our invention is to provide afllter assembly that shall be easily insertable in and removable from a cofle making machine,

by a push or pull on the assembly.

Another object of our invention is to provide a filter assembly that shall be so designed that the strainer cloth shall be yieldingly pressed downwardly against an annular seat in the coffee making machine. I

Other objects of our invention will either be specifically pointed out hereinafter in the course of a description of a form of device. now preferredby us, or will be apparent'from the description itself. I

In practicing our invention, we provide a flat ring locatable within a strainer cloth, which cloth may be of fiat bowl shape, and a handle having an intermediate part of substantially inverted U-shape extending at right. angles to the wire, with -radially bent-out arcuate portions at A ,the lower ends of the legs of the member of in- '.verted ll-shape, which connect them with sub- 0 stantially semi-circular end portions located adjacent to one face of the ring, the extreme ends of the semi-circular portions being securedto the ring at 'diametrally spaced points.

In the single sheet of drawingsf gure 1 is a vie in vertical sectiomthrough a glass coifee-making machine with which is associated the device embodying our invention,

Fig. 2 is a fragmentary view, in vertical section, and on a slightly longer'scale, of aportion of the assemblyshowninFig. 1,.

Fig. 3 is a view in front elevation of the frame part of our strainer cloth holder, and

Flg.4i'satopplanview ofthepartsshownin ReferringfirsttoFlgs. 1and2ofthedrawe have there illustrated a glass coifee maker ii comprising a lower bowl-shaped container l3 into which, as is well known, the water for making the coifee is initially placed. The devicev ll Rincludes an upper container or casing l5, both .members it and li'being preferably made of glass. 'The lower part of the upper container on casing I! has a funnel ifldepe di v therefrom, the upper end ofwhich is located 55 within a'resilient tubulsnswpper il which, in

turn, fits tightly in the upper neck portion 2| of the lower container l3, all in a .manner well known in the art.

The upper end of tunnel I1 is enlarged to provide a laterally extending fiat seat'portion 23 of somewhat larger diameter than the upper end of funnel i'l, as well as with a return-bent portion 25 providing, in effect, an annular shoulder imniediately above the substantially flat annular seat 23 which is, of course, located in a substanm daily-horizontal plane in a device of the kind shown in Figs-,1 and 2 of the drawing.

' A clamping ring 21 is located around the neck I portion 2| being spaced therefrom by a resilient collar 29 The clamp 21 may be made inany suitable or'desired manner in order to have secured thereto oneend of a handle 3| to permit x of carrying either the entire assembly or of carrying only the lower casing, all in a manner now well known in the art. I 20 It is necessary to associate with'the lower container l3 and the upper container IS a strainer cloth assembly to initially receive and contain. coffee grounds placed therewithin, and it is, of course, desirable to be able to easily and quickly 25 replace the strainer cloth with a new strainer cloth after one-of such cloths has been used a certain number of times. v I

The strainer cloth assembly, particularly constituting our invention, includes a strainer cloth 30 33 of any suitable or desired kind of cloth which is originally made of substantially circular shape, the peripheral edge thereof then being sewed.as to gather the same and make it shorter, whereby the strainer cloth will comprise a sub- 35 stantially fiat intermediate portion 35 and a wall portion 31" extending laterally of the flat intermediate portion to provide aboWI-shaped filter cloth. While we may use a drawstring with the outer peripheral edge of the strainer cloth, 40 we do not desire to be limited thereto since we have found that this is not an absolute necessity'.'

Means associated with the strainer cloth 33 for holding it and permitting of inserting itin andremoving it from its proper operative posi- 'tion in the upper end of the funnel include a ring 38 which is located in a single'plane and which is adapted to be located within the open top bowl shaped strainer cloth 33, as will be noted more'particularly by reference to Rigs. 1 and 2 of the'drawing.

A wire handle 4! includes an upper interme-' diate portion of substantially inverted U pe and comprising leg portions 43 and ll which. extend at substantially right angles-to the plane of the ring 39. If desired, the distance between the upper parts of legs 63 and 65 may be reduced, as is shown in Figs. 1 and 3 of the drawing although this is not an essential element of our invention.

The lower ends of the respective leg portions 63 and 45 are provided with radially bent-out arcuate portions M and at extending radially beyond the ring 39, which connect the respective leg portions with substantially semi-circular por- 4 tions 5! and 53, the extreme ends of each of which are secured against ring 39 at dianaetrally opposed points. The securing means is shown here as constituting lugs 55 and 51 integral with the fiat ring 39 extending initially substantially radially inwardly and then being return-bent over the extreme ends of the semi-circular portions 58 and 53.

We wish to here point out that in the free position of the semi-circular portions 5! and 5t.

the upper open end of upper container iii. Since the handle M is resilient in not only a. plane at .right angles to the ring 89 but also in a plane substantially parallel therewith, and since the arcuate bent-out portions all and w are separated from each other a distance greater than the inner diameter of the annular shoulder '25, a downward push on the upper end of handle at by an operator will cause the lower ends of legs 53 and 35 to move inwardly when pressed against the part ti of the upper container (see Fig. 2); after which theupper part of each of the bent-out portions it and as will fit under .the over-hanging iannular shoulder 25, as is shown more particularly in Fig. 2 of the drawing. This will have the result that the ring 3% is pressed against the intermediate fiat portion 35 of the strainer cloth and that the latter is pressed against the annular seat 28 at the upper end of funnel portion M. It is, of course, obviousthat the arcuate bent-out portions d! and 49 and the substantially semi-circular portions 5! and 53 are also resilient in a vertical direction. This hasthe result that the handle portion of the filter assembly is resilient not only in a substantially horizontal direction but also in a substantially vertical direction, as well as in a third plane which extends at substantially right angles to the other twoplanes of resiliency. This makes it relatively easy to insert the filter assembly by a straight line pressure down wardly or in a direction aligned with a longitudinal axis of the funnel ll, and to removethe assembly by apullon the handle exerted in a substantially opposite direction.

We here wish to point out particularly that the upper container 15 is closed relatively to the a funnel II, to prevent passage of solid particles of coffee grounds into funnel H, by reason of the portion 35 of the strainer cloth being pressed against the peripheral or annular seat 23 by the action of the two bent-put arcuate portions loneath the annular overhanging shoulder 25.

The device embodying our invention thuspro- 7 air-laces vides a relatively simple filter or strainer cloth assembly embodying aminimum number of parts and including a rigid ring associated with a t'riply resilient handle located above the ring.

Variousmodiflcations may be made in the device embodying our invention without departing from the spirit and scope thereof, and we dethe strainer cloth and a spring member, of sub-.

stantially inverted U-shape the ends being secured to the ring and said spring member having leg portions with bulged-out portions near their ends to engage under the annular shoulder and force the ring and cloth into close engagemen with the annular seat.

2. In a coffee makingpmachine including an upper container having a funnel depending therefrom, said funnel having an annular seatand an annular shoulder overhanging the seat, a filter assembly comprising a strainer cloth and a positioning frame therefor, said frame including a t rigid ring located within the strainer cloth and a resilient wire handle secured to the ring and having a pair of bent-out portions adapted to fit beneath the annular shoulder to press the ring and strainer cloth downwardly against the seat.

3. In a cofiee making machine including an upper container havinga funnel depending there-- from, said funnel having an annular seat and an annular shoulder overhanging the seat, a filter assembly comprising a strainer cloth and a positioning frame therefor, said frame including a fiat rigid ring located within the strainer cloth and a resilient wire handle having an intermediate portion of substantially inverted U-shape extending at substantially right angles to the plane of the ring, each leg of the intermediate portion having a bent-"out part, and end portions of substantially semi-circular shape located above the ring and means securing the-respective ends of the semi-circular portions to the ring.

4. A coflee making machine comprising in combination, an upper container having a funnel depending therefrom, said funnel having an annular seat and an annular overhanging shoulder thereabove, a filter assembly comprising a strainer cloth and a positioning frame therefor, said frame including a rigid rlnglocated within the strainer cloth and a wire handle secured to the ring and having portions extending respectively substantially parallel to and laterally of the plane of the'ring, both of said portions being resilient to permit insertion into and removal of the ring from its operative position adjacent the annular seat by a force exerted at right angles to the plane of the ring, said laterally extending portions of the handle operatively engaging the shoulder to press the ring and strainer cloth against the seat. 1 q 5. A coffee making machine comprising in combination, an upper container having a funnel depending therefrom, said funnel having an annular seat and an annular overhanging shoulder thereabove, afilter assembly comprising a strainer cloth and a positioning frame therefor, said frame ring, each leg having an arcuate outwardly-eittending portion adapted to fit beneath the annular shoulder portion, and substantially semicircular end portions extending substantially parallel with and above the ring and means rigidly securing the respective ends of the semicircular end portions against the upper surface of the ring.

6. A device as set forth in claim 5 in which thev securing means comprises integral lugs on 5 the ring bent over the wire ends.

BERNARD F. PARR. LEWIS J. GREENAWALTB I 

